CN216980217U - Cable with a protective layer - Google Patents

Abstract

The utility model provides a cable comprising: the conductor and the conductor shielding layer are wrapped on the outer side of the conductor; the insulating assembly is wrapped on the outer side of the conductor shielding layer; the semi-conductive buffer water-resistant layer is wrapped on the outer side of the insulating component; and the optical fiber element is arranged in the semi-conductive buffer water-blocking layer. Through the technical scheme provided by the utility model, the technical problem that the abnormal position of the cable is inconvenient to detect in the prior art can be solved.

Description

Cable with a protective layer

Technical Field

The utility model relates to the technical field of cables, in particular to a cable.

Background

At present, a high-voltage cable is an indispensable component in a power transmission and transformation equipment system, and particularly, the high-voltage cable cannot be separated in the process of building a large-scale power station and a power transmission line, and in the occasions of airports, subways, river crossing, sea crossing and the like. With the continuous development of urbanization in China, the power consumption and the power consumption quality of developed cities and provincial cities are continuously improved, and high-voltage cable power transmission networks are rapidly developed.

However, in the operation of the high-voltage cable, due to factors such as overload and environmental change, the cable is locally abnormal, but it is difficult to determine the abnormal position in operation.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a cable to solve the technical problem that the abnormal position of the cable is inconvenient to detect in the prior art.

In order to achieve the above object, the present invention provides a cable comprising: the conductor and the conductor shielding layer are wrapped on the outer side of the conductor; the insulating assembly is wrapped on the outer side of the conductor shielding layer; the semi-conductive buffer water-resistant layer is wrapped on the outer side of the insulating component; and the optical fiber element is arranged in the semi-conductive buffer water-blocking layer.

Furthermore, the semi-conductive buffering water-blocking layer comprises a first semi-conductive buffering water-blocking tape and a second semi-conductive buffering water-blocking tape, the first semi-conductive buffering water-blocking tape and the second semi-conductive buffering water-blocking tape are arranged at intervals, and the optical fiber element is arranged in a gap between the first semi-conductive buffering water-blocking tape and the second semi-conductive buffering water-blocking tape.

Further, the optical fiber element is spirally arranged; and/or the optical fiber elements are at least two, and the at least two optical fiber elements are arranged at intervals.

Further, the cable further comprises: and the metal sheath is wrapped on the outer side of the semi-conductive buffer water-resistant layer and is of a smooth structure so that the metal sheath is attached to the semi-conductive buffer water-resistant layer.

Further, the cable further comprises: the flame retardant coating wraps the outer side of the metal sheath and is made of ceramic materials.

Furthermore, the outer side of the metal sheath is provided with a hot melt adhesive coating layer, and the fire-resistant layer is fixed with the metal sheath through the hot melt adhesive coating layer.

Further, the cable further comprises: the insulating inner sheath is wrapped on the outer side of the fire-resistant layer; the flame-retardant outer sheath is wrapped on the outer side of the insulating inner sheath; and the semi-conducting layer is wrapped on the outer side of the flame-retardant outer sheath.

Further, the insulating inner sheath is made of polyethylene material; and/or the flame-retardant outer sheath is made of polyvinyl chloride material.

Further, be provided with a plurality of conductors in the conductor shielding layer, a plurality of conductors all have the performance of blocking water, have the clearance between two adjacent conductors, and the cable still includes: and the water blocking piece is arranged in the gap and is made of a water absorbing material.

Further, the water-blocking piece is a water-blocking yarn or a water-blocking tape.

By applying the technical scheme of the utility model, the optical fiber element is arranged in the semiconductive buffering water-blocking layer, the ratio change of physical quantities such as temperature, pressure, stress and the like of the cable body can be sensed through the optical fiber element, and the safe operation and position positioning of the cable can be conveniently detected through the change of parameters such as light intensity, wavelength, phase and the like, so that the safe operation of the high-voltage cable is ensured.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 shows a schematic structural view of a cable provided according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

1. a conductor; 2. a conductor shield layer; 3. a crosslinked polyethylene insulating layer; 4. an insulating shield layer; 5. an optical fiber element; 6. a semiconductive buffer water-resistant layer; 7. a metal sheath; 8. a refractory layer; 9. an insulating inner sheath; 10. a flame retardant outer jacket; 11. a semiconducting layer.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1, the embodiment of the present invention provides a cable, which includes a conductor 1, a conductor shield layer 2, an insulation component, a semi-conductive buffer water-resistant layer 6 and an optical fiber element 5, wherein the conductor shield layer 2 is wrapped on the outer side of the conductor 1, the insulation component is wrapped on the outer side of the conductor shield layer 2, the semi-conductive buffer water-resistant layer 6 is wrapped on the outer side of the insulation component, and the optical fiber element 5 is arranged in the semi-conductive buffer water-resistant layer 6. Preferably, the cable in this embodiment is a high voltage cable.

By adopting the cable provided by the embodiment, the optical fiber element 5 is arranged in the semi-conductive buffer waterproof layer 6, on one hand, the ratio change of physical quantities such as temperature, pressure, stress and the like of the cable body can be sensed through the optical fiber element 5, and on the other hand, the safe operation and position positioning of the cable can be conveniently detected through the change of parameters such as light intensity, wavelength, phase and the like, so that the safe operation of the high-voltage cable is ensured; on the other hand, the optical fiber element 5 can be better protected by the semi-conductive buffer water-blocking layer 6.

Specifically, the insulation assembly in this embodiment includes a crosslinked polyethylene insulation layer 3 and an insulation shielding layer 4, where the crosslinked polyethylene insulation layer 3 is wrapped on the outer side of the conductor shielding layer 2, and the insulation shielding layer 4 is wrapped on the outer side of the crosslinked polyethylene insulation layer 3.

In this embodiment, the semi-conductive buffer water-blocking layer 6 includes a first semi-conductive buffer water-blocking tape and a second semi-conductive buffer water-blocking tape, the first semi-conductive buffer water-blocking tape and the second semi-conductive buffer water-blocking tape are disposed at an interval, and the optical fiber element 5 is disposed in a gap between the first semi-conductive buffer water-blocking tape and the second semi-conductive buffer water-blocking tape. By adopting the structure, the optical fiber element 5 can be protected better through the first semi-conductive buffer water-blocking tape and the second semi-conductive water-blocking tape, so that the detection accuracy is ensured.

Specifically, the optical fiber element 5 is arranged spirally. Alternatively, the optical fiber elements 5 are at least two, and at least two optical fiber elements 5 are arranged at intervals. Alternatively, the optical fiber element 5 is spirally disposed; and at least two optical fiber elements 5 are arranged, and the at least two optical fiber elements 5 are arranged at intervals.

Preferably, the optical fiber element 5 in the present embodiment is spirally arranged; and at least two optical fiber elements 5 are arranged, and the at least two optical fiber elements 5 are arranged at intervals. By adopting the structure, the detection accuracy can be improved conveniently, so that the running condition of the cable can be judged conveniently.

In this embodiment, the cable further includes a metal sheath 7, the metal sheath 7 wraps the outer side of the semi-conductive buffer water-resistant layer 6, and the metal sheath 7 is of a smooth structure, so that the metal sheath 7 and the semi-conductive buffer water-resistant layer 6 are attached to each other. Adopt such structure setting, can effectively increase the area of contact of semiconduction buffering water-blocking layer 6 and metal sheath 7, realize semiconduction buffering water-blocking layer 6 and metal sheath 7's comprehensive contact, and then solved and avoided leading to the big condition of contact resistance because of the clearance increase between semiconduction buffering water-blocking layer 6 and the metal sheath 7, and then avoided the cable to generate heat and ablated insulation shielding, finally avoid the cable to break down. Specifically, the metal sheath 7 in the present embodiment is made of aluminum, and the metal sheath 7 is an aluminum sheath structure. It should be noted that the "metal sheath 7 is of a smooth structure" here mainly means that there are few wrinkles on the metal sheath 7 so that the metal sheath 7 and the semi-conductive buffer water-blocking layer 6 are in sufficient contact with each other.

Specifically, the cable in this embodiment further includes a fire-resistant layer 8, where the fire-resistant layer 8 is wrapped on the outer side of the metal sheath 7, and the fire-resistant layer 8 is made of a ceramic material. By adopting the structure, when a fire disaster happens, the cable can continuously supply power within a preset time, and valuable time is provided for people to evacuate, rescue and salvage. Specifically, the refractory layer 8 made of the ceramic material can be continuously supplied with power for 90 min.

In this embodiment, a hot melt adhesive coating layer is disposed on the outer side of the metal sheath 7, and the fire-resistant layer 8 is fixed to the metal sheath 7 through the hot melt adhesive coating layer. By adopting the structure, the connection stability between the metal sheath 7 and the fire-resistant layer 8 can be improved conveniently, and the mutual movement between the metal sheath 7 and the fire-resistant layer 8 is avoided.

Specifically, the cable in this embodiment further includes an insulating inner sheath 9, a flame-retardant outer sheath 10, and a semi-conducting layer 11, where the insulating inner sheath 9 is wrapped on the outer side of the flame-retardant layer 8, the flame-retardant outer sheath 10 is wrapped on the outer side of the insulating inner sheath 9, and the semi-conducting layer 11 is wrapped on the outer side of the flame-retardant outer sheath 10. Adopt such structure setting, through setting up double-deck sheath structure, can make this structure have high insulating properties and high flame retardant property concurrently simultaneously for the cable has possessed high reliability. Specifically, the flame-retardant outer sheath 10 is made of a high polymer material with a large amount of flame retardant added, so that the volume resistivity of the high polymer material is greatly reduced, the insulating property of the outer sheath is reduced, and particularly, when a single cable is laid in water or a humid environment for a long time, the insulation resistance of the outer sheath is reduced due to cliff, and cable faults are caused in serious cases.

Specifically, the insulating inner sheath 9 is made of a polyethylene material. Alternatively, the flame retardant outer sheath 10 is made of a polyvinyl chloride material. Alternatively, the insulating inner sheath 9 is made of a polyethylene material and the flame retardant outer sheath 10 is made of a polyvinyl chloride material.

Preferably, the insulating inner sheath 9 in this embodiment is made of a polyethylene material and the flame retardant outer sheath 10 is made of a polyvinyl chloride material. Namely, the inner layer is made of high-density polyethylene, has ultrahigh volume resistivity which reaches 1 multiplied by 1014 omega.m, and meanwhile, the material is extremely difficult to absorb water, thereby ensuring the insulating property. The outer layer adopts the extruded flame-retardant semi-conducting layer 11, has high flame retardant property, and the outer sheath of the structure has high insulating property and high flame retardant property at the same time, so that the high-voltage cable has high reliability.

In the embodiment, the semi-conducting layer 11 is extruded outside the flame-retardant outer sheath 10, compared with the conventional graphite conducting layer, the flame-retardant outer sheath 10 in the embodiment does not generate any dust in the production and laying process, and is an environment-friendly production mode.

Specifically, be provided with a plurality of conductors 1 in the conductor shielding layer 2 of this embodiment, a plurality of conductors 1 all have the performance of blocking water, have the clearance between two adjacent conductors 1, and the cable still includes the piece that blocks water, blocks water the piece and sets up in the clearance, blocks water and makes by water absorbing material. By adopting the structure, when the water blocking piece meets water, the water blocking piece directly absorbs and expands to fill the gap, thereby effectively isolating the spreading of water and achieving the water blocking effect.

In this embodiment, the water-blocking member is a water-blocking yarn or a water-blocking tape to improve the water-swelling effect.

Specifically, the conductor 1 in this embodiment is a water-blocking conductor 1; an optical fiber sensing element is arranged in the semi-conductive water-blocking buffer layer; the ceramic fire-resistant layer 8 is extruded outside the aluminum sheath; the outer sheath is a polyethylene and polyvinyl chloride double-layer structure and has high insulating property and flame retardant property. The cable comprises a water-blocking conductor 1 and an outer conductor 1 semi-conductive shielding layer thereof, a cross-linked polyethylene insulating layer 3, an insulating semi-conductive shielding layer and the like, when in specific production, a semi-conductive water-blocking buffer layer is wrapped outside an insulating wire core, two optical fibers are spirally placed between the semi-conductive buffer water-blocking tapes, a smooth aluminum sheath is drawn outside the water-blocking buffer layer, a hot melt adhesive coating layer is arranged outside the aluminum sheath, a ceramic fire-resistant layer 8 is extruded outside the hot melt adhesive coating layer, a high-density polyethylene inner sheath and a flame-retardant polyvinyl chloride outer sheath are sequentially extruded outside the fire-resistant layer 8, and the semi-conductive layer 11 is extruded on the outermost layer.

The cable in this embodiment can be suitable for the 110kV crosslinked polyethylene insulated photoelectric composite fire-resistant water-blocking high-voltage condition, and the specific structure of the cable refers to fig. 1, in which the conductor 1 is used for compressed twisting for transmitting current and connecting accessories, the conductor 1 is preferably a water-blocking copper conductor structure, the gap of the conductor 1 is filled with water-blocking yarn, and the conductor 1 is wrapped by a semi-conductive tape. And a three-layer co-extrusion process is adopted outside the conductor 1, and a conductor shielding layer 2, a crosslinked polyethylene insulating layer 3 and an insulating shielding layer 4 for uniform electric field are extruded. A semi-conductive water-blocking buffer belt is wound outside the insulation shielding layer 4 to form a semi-conductive buffer water-blocking layer 6, so that the semi-conductive buffer water-blocking layer is used for buffering the extrusion deformation of the cable due to the insulation expansion caused by heat and contraction caused by cold in the running process of the cable, and the cable is prevented from spreading after water enters; and an optical fiber sensing element is arranged in the water blocking buffer layer and used for sensing the ratio change of physical quantities such as temperature, pressure, stress and the like of the cable body so as to monitor the running condition of the cable. Drawing a smooth aluminum sheath outside the buffer layer, wherein the smooth aluminum sheath is fully contacted with the semiconductive buffering water-blocking tape to achieve the effects of metal shielding, armoring and radial water blocking; the ceramic fire-resistant layer 8 is extruded on the outer layer, when a fire disaster occurs, the power can be continuously supplied for 90min, and precious time is provided for evacuation, rescue and first-aid repair of personnel. The outer layer is extruded with high-density polyethylene flame-retardant semi-hard polyvinyl chloride, the inner layer polyethylene ensures the insulation resistance of the outer sheath, and the outer sheath ensures the flame-retardant performance of the cable; the outermost layer is an extruded flame-retardant semi-conducting layer 11 which is used for replacing a conventional graphite conducting layer, does not generate any dust in the production and laying processes, and is an environment-friendly structural mode.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: simple manufacturing process, full water resistance, high reliability, high safety and environmental protection.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A cable, comprising:

the cable comprises a conductor (1) and a conductor shielding layer (2), wherein the conductor shielding layer (2) is wrapped on the outer side of the conductor (1);

the insulating component is wrapped on the outer side of the conductor shielding layer (2);

the semi-conductive buffer water-resistant layer (6) is wrapped on the outer side of the insulation component;

and the optical fiber element (5) is arranged in the semi-conductive buffer water-proof layer (6).

2. The cable according to claim 1, wherein the semi-conductive buffered water-blocking layer (6) comprises a first semi-conductive buffered water-blocking tape and a second semi-conductive buffered water-blocking tape, the first semi-conductive buffered water-blocking tape and the second semi-conductive buffered water-blocking tape are spaced apart, and the optical fiber element (5) is disposed in a gap between the first semi-conductive buffered water-blocking tape and the second semi-conductive buffered water-blocking tape.

3. The cable of claim 1,

the optical fiber element (5) is arranged in a spiral shape; and/or the presence of a gas in the gas,

the number of the optical fiber elements (5) is at least two, and the at least two optical fiber elements (5) are arranged at intervals.

4. The cable of claim 1, further comprising:

the metal sheath (7) wraps the outer side of the semi-conductive buffer water-resistant layer (6), and the metal sheath (7) is of a smooth structure, so that the metal sheath (7) and the semi-conductive buffer water-resistant layer (6) are attached to each other.

5. The cable of claim 4, further comprising:

the fireproof layer (8) wraps the outer side of the metal sheath (7), and the fireproof layer (8) is made of ceramic materials.

6. Cable according to claim 5, characterized in that the outer side of the metal sheath (7) is provided with a hot-melt adhesive coating layer by means of which the flame-resistant layer (8) is fixed to the metal sheath (7).

7. The cable of claim 5, further comprising:

the insulating inner sheath (9) is wrapped on the outer side of the fire-resistant layer (8);

the flame-retardant outer sheath (10) is wrapped on the outer side of the insulating inner sheath (9);

and the semi-conducting layer (11) is wrapped on the outer side of the flame-retardant outer sheath (10).

8. The cable of claim 7,

the insulating inner sheath (9) is made of polyethylene material; and/or the presence of a gas in the gas,

the flame-retardant outer sheath (10) is made of polyvinyl chloride material.

9. The cable according to claim 1, wherein a plurality of said conductors (1) are arranged in said conductor shield (2), each of said plurality of conductors (1) having water blocking properties, and a gap is provided between two adjacent conductors (1); the cable further includes:

and the water blocking piece is arranged in the gap and is made of water absorbing materials.

10. A cable according to claim 9 wherein the water blocking member is a water blocking yarn or tape.

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